There have been robbery attempts in Calgary, Edmonton and Leduc, Alta., aimed at women who advertise sexual services online.

Acting Staff Sgt. Andy Woodwald said in one case, a woman met with the man in a hotel room after they’d been on touch online. He told her he was a police officer and indicated he had a search warrant for drugs.

The woman demanded a badge number and the suspect responded by grabbing and pushing her.

The suspect fled the business after the woman told him to call for backup.

“She actually called his bluff and said if you’re really a police officer, go and get more resources,” said Woodwald.

She actually called his bluff and said if you’re really a police officer, go and get more resources

Also on Friday, an Edmonton photo radar supervisor charged with kidnapping and sexual assault was been denied bail.

Police have said a woman was driving home early on June 4 when a man driving a car with flashing lights told her to pull over. Investigators say she told them a man wearing what looked like a police uniform told her she would not face any charges if she performed sex acts on him.

Deputy Chief Kevin Brezinski told reporters Friday it’s alleged the accused was wearing his legitimate uniform while driving home from working in his personal vehicle.

“He wasn’t impersonating a peace officer because he was a peace officer,” Brezinski said.

Paul David Derksen, who is 50, is being held in custody and is to appear again in court on July 7.